Last Updated：2025/11/28

The cap that closes the opening of a tank, e.g. the fuel tank of a car, through which the tank can be filled.

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filler cap

Source Word

filler cap

Noun

The cap that closes the opening of a tank, e.g. the fuel tank of a car, through which the tank can be filled.

Japanese Meaning

タンクの開口部を閉じるための蓋。例えば、自動車の燃料タンクの場合、タンクへの燃料の注入口を閉じるキャップを指す。

Before the long trip, she double-checked that the filler cap on the spare gas can was tightly secured.

長距離旅行の前に、彼女は予備の携行燃料缶の給油口キャップがしっかり閉まっているかをもう一度確認した。

Sense（1）

The cap that closes the opening of a tank, e.g. the fuel tank of a car, through which the tank can be filled.

filler caps

（ plural ）